Fastening device



March 4, 1952 JENSEN ET AL 2,587,853

FASTENING DEVICE Filed June 16, 1949 2 SHEETSSHEET l JJLJeJ-Lscn .D. JiRusi ATYORNEYS March 4, 1952 Filed June 16. 1949 J. H. JENSEN ET AL FASTENING DEVICE 2 SHEETS-SHEET 2 .IffiJ'ensen .D. JIRusZ Mimi:

ATTORNEYS Patented Mar. 4, 1952 Leandra, Calif., assignors' to Ry -Lock Company, LtcL, San Leandro, Califi, a corporation of California Application June 16,1949, Serial No. 99,402

3 Claims. 1 This invention relates generally to improve ments in frameless type window screens having transverse end bars, one being anchored to thewindow frame and the other cooperating with frame mounted tension devices which maintain the screen taut.

One important object of this invention is to provide a tension device, for frameless window screens, which is of novel construction; such device being easy to install, convenient touse, and operative to exert a relatively great tension on the screen.

A further object of the invention is to provide a tension device, for the purpose described, which can be readily secured, or quick-released, by hand.

An additional object of the present invention is to provide a tension device, as above, which comprises a novel bracket mounted tension lever formed with a hook for engagement with an adjacent cross bar of the screen; such lever being positioned for over-dead-center looking with the hook holding the screen under tension.

Another object of the invention is to accomplish effective tensioning of a frameless window screen by means of a pair of separate tension devices cooperating with opposite and extended end portions of an adjacent transverse end bar; such arrangement permitting said devices to mount on the jambs of the window frame laterally of, and to work in clearance relation to, the edges of the screen.

It is also an object of the invention to provide a tension device designed for ease and economy of manufacture; the device being simple but sturdy.

A still further object of the invention is to provide a practical and reliable tension device, and yet one which will be exceedingly efiective for the purpose for which it is designed.

These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings:

Fig. l is a fragmentary, foreshortened, front elevation of the lower portion of a frameless window screen showing a pair of the tension devices operatively engaged with the transverse, bottom end bar of the screen.

Fig. 2 is an end elevation of the same; the adjacent tension device being in locked position.

Fig. 3 is a similar view, but shows the adjacent tension device released.

Referring now more particularly to the characters of reference on the drawings, the numeral I indicates a screen, of wire cloth or the like; such screen being fitted, at opposite ends, with a transverse top end bar 2 and a transverse bottom end bar 3.

The topend bar 2 is affixed to the header 4 of a window frame by suitable attachment devices, indicated generally at 5; such attachment devices being fixed or non-adjustable with respect to the tension of the screen I.

The bottom end bar 3 is of substantial height, and at its lower portion abuts against the vertical stop 6 or the like of the window frame sill I.

Both the top end bar 2 and bottom end bar 3 are of sheet metal, and are bent along their inner longitudinal edges to form channels 8, which open in a direction away from the screen I,. for the reception of adjacent folded edge margins!) of said screen; said channels 8 having such folded edge margins 9 of the screen clamped therein. In this manner the screen I is effectively and positively secured to the end bars 2 and 3 for mounting in connection with the window frame.

The bottom end bar 3 is of greater length than the width of the screen I, whereby end portions I0 of said bottom and bar 3 project laterally beyond opposite side edges of the screen. The upper edges of the laterally projecting end portions I0 have rounded shoulders ll formed by the corresponding channel 8; such shoulders being for the purpose hereinafter described.

Laterally of opposite sides of the screen I and directly above the shoulders II of the laterally projecting end portions II), the jambs I2 of the window frame are fitted with tension devices, each indicated generally at I3.

As both tension devices I3 are identical, except for being right and left hand, a description of one will suffioe for both.

Each tensioning device I3 comprises an outwardly projecting bracket I4 laterally. flanged at its inner end, as at I5, with such flange I5 lying flush against the adjacent jamb I2.

Vertically spaced screws I6 and I1 extend through the flange 5 to attach the bracket I4 to the jamb I2. The lowermost screw hole in the flange I5 is a vertically elongated slot I8 whereby to permit of initial adjustment of the bracket I4 on the jamb I2. The bracket I4 is first secured to the jamb I2 solely by the screw I6, and when proper positioning of the bracket has been ascertained the screw I7 is applied.

A longitudinal tension lever I9 is pivoted at its upper end, as at 20, to the bracket [4 for swinging generally in the direction of tensioning of the screen I, and between a downwardly and outwardly inclined released position, as in Fig. 3, to an inward over-dead-center locked position, as in Fig. 2.

Intermediate its ends the tension lever i9 is formed with an inwardly projecting, relatively shallow hook 2i which faces in the direction of tensioning of the screen I.

To tension the screen I each lever l9, starting with it in its release position as in Fig. 3, is manipulated to engage the hook 21 over the shoulder H on the adjacent laterally projecting end portion ID of the bottom end bar 3. Thereafter, each tension lever 19 is swung inwardly by manually depressing a finger pad -.22 on the free end of the lever, and as the latter swings inthe present and preferred construction of the defrom, a depending lever pivoted on the bracket wardly it snaps beyond-dead-center under the tension imposed on thescreen I. This is the locked position of each tension device as shown in Fig. 2.

With both of the tension devices l3 swung inwardly over-dead-center to locked position, the screen I has a relatively great tension imparted thereto in order to maintain such screen taut and tight against the jambs l2, as is desirable.

The tension devices l3, being quick-locking and quick-releasable, are very convenient andhandy to manipulate, and when in use serve extremely well for the intended purpose.

While these tension devices are intended primarily for use in connection with inside screens on casement Windows or the like, obviously they,

are not so limited in their adaptation.

When the screen is used on a casement window which is actuated by a detachably crank, the bottom end bar 3 is formed with a port 23 for passage of the crank shaft; such port normally being closed by a swing cover 24.

From the foregoing description it will be readily seen that there has been produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail for vertical swinging movement, and a downwardly facing hook on the inner edge of the lever intermediate its ends adapted to engage over the bottom bar; the width of the hook being no greater than that of the bar.

2. A device as in claim 1, in which said inner edge-of the lever is shaped below the hook to follow the contour of the outer face of the bottom bar and then flare outwardly to its lower end.

3. A device for holding the bottom bar of a frameless window screen against a window casing, said device comprising a bracket adapted to be secured against one side of the window casing above the sill and projecting outwardly therefrom, a depending lever pivoted on the bracket for vertical swinging movement, and a downwardly facing hook on the inner edge of the lever intermediate its ends adapted to engage over the bottom bar.

JACK I-I. JENSEN. DAVID JORDAN RUST.

REFERENCES CITED The following references are of record in the file of this patent: 

